17 votes

I accidentaly enabled the UFW on my Google Cloud Computer

This answer shows two methods of solving this problem. The first method is to create a startup-script that disables UFW. The second method attaches the boot disk to another instance and modifies the ...
John Hanley's user avatar
  • 4,924
12 votes
Accepted

Meltdown & Spectre - Does patching the guest kernel of an unpatched hypervisor prevent cross-VM memory leaks?

From what I understand of the vulnerabilities, no - the speculative caching attacks bypass all of the CPU's protections against a process grabbing memory from whatever arbitrary address. I believe ...
Shane Madden's user avatar
11 votes
Accepted

What is Load Balancer Warmup?

I'm compiling an answer based on the comments on the post, thanks to @Tim and @Michael Hampton From Petrutandrei's blog- The ELB is designed to handle large loads of traffic (20kb/sec) without a ...
Joey Pinto's user avatar
7 votes
Accepted

CentOS 7 Generic Cloud login?

The default username for the CentOS 7 cloud image is centos. There is no password; instead you log in with the ssh key you provided at instance creation. You can then sudo and do whatever you like.
Michael Hampton's user avatar
6 votes
Accepted

Is it possible to Stop and Deallocate Azure VM from the VM itself?

You can run either the Azure CLI or the newer AZ PowerShell core cmdlets on a Linux VM, both are cross platform and would allow you to do this. CLI: az vm deallocate -g MyResourceGroup -n MyVm AZ ...
Sam Cogan's user avatar
  • 39k
6 votes
Accepted

Understanding Nutanix features

Nutanix is proprietary Software-Defined Storage stack (NDFS, Nutanix Distrubuted File System) which is nothing but NFS/SMB3 gateway built on top of Java-written Cassandra DB, + open-source derived ...
BaronSamedi1958's user avatar
6 votes

Where is log output from cloud-init stored?

The log is stored in systemd: journalctl -u cloud-final
Graham North's user avatar
5 votes
Accepted

Should I regard openstack cloud servers as just another type of virtualization?

If you want redundancy you still need to plan for it. Cloud providers (regardless of the platform) still have outages on both the host and datacenter levels. Usually there is a pool of hosts and you ...
Grant's user avatar
  • 18k
4 votes
Accepted

Can we install and run VMware ESXi on a parallels server?

Since you need to get virtualization for free, VMware vSphere Hypervisor is not an option. That being said, VMware vSphere Free edition would not provide any beneficial features like erasure coding, ...
Mr. Raspberry's user avatar
4 votes

CentOS 7 Generic Cloud login?

If you downladed the GenericCloud image from cloud.centos.org, it does not have any users created. You can change the root password using virt-customize from libguestfs-tools package: # virt-customize ...
Viceman's user avatar
  • 41
4 votes

Are oversubscription and overcommitment the same?

They basically mean the exactly same thing, but the difference is in the angle of view: subscription (or oversubscription) is a term that defines the situation looking through the lenses of clients (...
galaxy's user avatar
  • 2,157
3 votes

Terraform, ecs service creation fails when using a configured IAM policy

Turns out I needed to set the service to ecs.amazonaws.com and not ec2.amazonaws.com in my aws_iam_role. I'd tried this before, but didn't specify sufficient in the aws_iam_role_policy . It's very ...
Frye's user avatar
  • 253
3 votes

Cloud computing options for web mining a lot of data in parallel?

Without knowing more about your exact script you probably want something that can run lambda functions: AWS Lambda Azure Functions Google Cloud Functions No VMs to worry about, pay per-second-per-...
Mark Henderson's user avatar
3 votes
Accepted

How should I interpret disk IOPS listed by cloud hosting providers vs. those listed by drive manufacturers?

Google does specify 900.000 to 2.700.000 IOPS for a local SSD. That shows their hardware is perfectly capable. The "zonal SSD" has a much lower IOPS, but that is a disk which is accessible ...
MSalters's user avatar
  • 700
3 votes

Is it possible to run a virtual machine with the combined processing power of multiple physical machines?

No, commodity hypervisors commonly used for enterprise cannot span a virtual machine across multiple physical hosts. More difficult to do, and outside their typical use cases of consolidation of "...
John Mahowald's user avatar
3 votes
Accepted

selecting vCPU harware family while creating VMs on AWS or Azure or Google compute

Try this yourself. Get instances on each of the providers in question and see what choices you have. In general, the answer is no. Rent a computer IaaS does not give you a choice of specific CPU ...
John Mahowald's user avatar
2 votes

Instance's deployment / post configuration for AWS Elastic Beanstalk

As written before using configuration file Create a file: ./.ebextensions/myapp.config with the following: packages: yum: memcached: [] container_commands: 01_memcached_start: ...
Moshe Kaplan's user avatar
2 votes

EC2: maximum shutdown time exceeded

https://docs.aws.amazon.com/cli/latest/reference/ec2/reboot-instances.html If an instance does not cleanly shut down within four minutes, Amazon EC2 performs a hard reboot.
somebody's user avatar
2 votes
Accepted

Can I configure non-Google Cloud resources as origin for Google Cloud CDN?

Google Cloud CDN has recently been updated to allow an origin outside of GCP. It does still require usage of their loadbalancer. https://cloud.google.com/cdn/docs/custom-origins-overview
Noah's user avatar
  • 136
2 votes

Can I configure non-Google Cloud resources as origin for Google Cloud CDN?

Google Cloud CDN only works with an HTTP(s) load balancer, as described in this link. Also, a backend bucket can only be a Google Cloud Storage bucket as described in here.
Marilu's user avatar
  • 296
2 votes

Can we install and run VMware ESXi on a parallels server?

My question would be: Why? If you want distributed storage, consider using a storage cluster or VSAN
Jarrod L. J. Gibson's user avatar
2 votes

Can we install and run VMware ESXi on a parallels server?

To run a hypervisor on a hypervisor, the base hypervisor software must support "nested hypervisors" or "nested virtualization", as x86 hardware can't currently do that in hardware from what I ...
LawrenceC's user avatar
  • 1,212
2 votes

What is the difference between the cloud disks supported by Alibaba Cloud?

These is the difference between SSD and Ultra Cloud Disk: SSD Cloud Disk: High-performance disks with stable and high random I/O performance and high data reliability. It handles 20,000 read/write ...
Vong Nyuk Yun's user avatar
2 votes

Who are the cloud computing "operators" and what do they do?

"Operators" in this case is simply referring to "users" of cloud services. This would likely refer to "system operators" (sysops) who are the ones administering the servers in the cloud (versus on ...
michaelkrieger's user avatar
2 votes

How should I interpret disk IOPS listed by cloud hosting providers vs. those listed by drive manufacturers?

Quotas. Multi-tenancy. Counting host IOPS after redundancy. Scalability limits with their (probably IP based) storage stack. Selling a premium faster SSD disk. Actually being honest and conservative ...
John Mahowald's user avatar
2 votes

How to renew a certificate in Kubernetes 1.12

Try running kubeadm alpha certs check-expiration Commands that are standardised in later versions might have been released as experimental sub commands in older versions of k8s; hence the "alpha&...
hisdudeness's user avatar
2 votes
Accepted

Block Storage Metadata

The block storage, as the name says, can only store fixes size blocks, typically 512 bytes. The each has it's own address, which is hardware specific. You can read or write the whole block only. All ...
kofemann's user avatar
  • 4,876
2 votes

In cloud, is it possible to access guest VM from host machine?

For the specifics of getting out of band access to your favorite rent-a-computer service, refer to their documentation. Usually called console access, serial console for the text version. Good ...
John Mahowald's user avatar
1 vote

google compute engine boot disk is full and ssh shell not responding

Do you tried to follow this documentation [1] ? I also found this step-by-step walk-through doc [2] from a 3rd party website, that worth to give it a try. If you already added more capacity to your ...
Bruno's user avatar
  • 145
1 vote

How to organize projects in AWS?

Your primary options for logical organization are: Everything one one account / one VPC with separation by tagging or subnets (not ideal) One account / one VPC per application per environment (better)...
Tim's user avatar
  • 32.8k

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